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Finding the Fourth Proportional to 19,992.88, 27,599.15 and 13,190.90

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Solution

The fourth proportional to 19,992.88, 27,599.15 and 13,190.90 is: 18,209.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,992.88 : 27,599.15 = 13,190.90 : x
  2. Step 2: Convert to fraction form
    19,992.88/27,599.15 = 13,190.90/x
  3. Step 3: Cross multiply
    19,992.88x = 27,599.15 × 13,190.90
  4. Step 4: Simplify right side
    19,992.88x = 364,057,615.45
  5. Step 5: Solve for x
    x = 364,057,615.45/19,992.88
  6. Step 6: Final answer
    x = 18,209.37

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.